PAPERS ON BOTANY 125 



Lindheimeri. New Brunsfels, Texas. South, north and 

 westward. Bright green. Bristles and spines various 

 but always yellow or greenish yellow. O. arizonica, Tuc- 

 son, Arizona; eastward far into Texas. Bright green. 

 Bristles various shades of brown. Spines yellow with col- 

 ored base. 0. occidentalis and Utoralis come under the 

 lindheimer type as does also linguiformis but are well 

 described in other literature and quite distinct. O. chloro- 

 tica can hardly be classed here on account of being smaller 

 in every way. 



0. Toiimeyi is also much smaller than O. arizonica, al- 

 though of the same type. O. castillea Griff. Tucson, Ariz., 

 is of the Ficus-Indica type. Dark green slightly glaucous 

 and few spined. O. fusicanlis appears to be a variety of it 

 with thicker and larger joints. 



Another peculiar incident is O. Elisiana. Griff, the only 

 good types definitely known are those cultivated and 

 advertised by B. R. Russell, San Saba, Texas, as his 

 natural spineless cactus. It appears by Emory's records 

 that this plant also received the unpublished name of 

 anacantha by Engelmann. From information by old set- 

 tlers it appears that in earlier years this plant like mam- 

 millaria lasiacantha was abundant in central Texas, and 

 the former very likely also in New Mexico. Many reasons 

 for their near extinction have been proposed, the most 

 logical being that they were obliterated by the vast herds 

 of grazing cattle. 



